| CHeSS HR1 - Recommended good practice
(2000) |
CHeSS HR2 - Recommended best practice
(2000) |
| System description
Domestic Wet Central Heating System with regular boiler and separate
hot water store. |
System description
Domestic Wet Central Heating System with regular boiler and separate
hot water store. |
| Boiler A regular boiler (not a combi) which has
a SEDBUK efficiency of at least :
- 78% if fuelled by natural gas (bands A to D)
- 80% if fuelled by LPG (bands A to C, and some from band D)
- 83% if fuelled by oil (bands A and B, and some from band C)
Boiler (see Notes 3 and 4) : |
Boiler
A regular boiler (not a combi) which has a SEDBUK efficiency of at least
:
- 82% if fuelled by natural gas (bands A to C)
- 84% if fuelled by LPG (bands A and B, and some from band C)
- 85% if fuelled by oil (bands A and B, and some from band C)
Boiler (see Notes 3 and 4) : |
| Hot water store EITHER
A hot water cylinder, whose heat exchanger and insulation properties
both meet or exceed (see Note 5) those
of the relevant British Standards.
OR
A thermal (primary) storage system, whose insulation properties meet
or exceed those specified in Reference 4. |
Hot water store
High performance hot water cylinder (see Note
6)
OR
High performance thermal primary storage system (see
Note7) |
| Controls (see
Notes 8, 9 and 10) :
- Full programmer
- Room thermostat
- Cylinder thermostat
- Boiler interlock (see Note 11)
- TRVs on all radiators, except in rooms with a room thermostat
- Automatic bypass valve (see Note 12)
Installation : see Notes 1 and 2 |
Controls (see Notes
8, 9 and 10)
- Programmable room thermostat, with additional timing capability for
hot water
- Cylinder thermostat
- Boiler interlock (see Note 11)
- TRVs on all radiators, except in rooms with a room thermostat
- Automatic bypass valve (see Note 12)
Installation : see Notes 1 and 2 |
 |
|
